牛津译林版八年级英语下册Unit1Grammar公开课ppt课件.ppt
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1、8B Unit 1 Past and Present Grammar Learning aims:1.Master the structure and basic usage of present perfect tense(PPT).(掌握现在完成时的基本结构、用法。)(掌握现在完成时的基本结构、用法。)2.Learn the rules of forming the past participle of verbs.(学习动词的过去分词变化规则。)(学习动词的过去分词变化规则。)3.Learn some time expressions usually used in PPT.(学习常用在
2、现在完成时里的时间表达方式。)(学习常用在现在完成时里的时间表达方式。)1.How long has Mr.Chen lived in Sunshine Town?2.What has the government done to part of the town center?3.Why does Mr.Chen think it is impossible to see his old friends as often as before?Step1:Lead-inAsk and answerHe has lived there since he was born.The governme
3、nt has turned part of the town center into a new park.Because his friends have moved away.Pre task:Learn on their own and answer When do we use present perfect tense?We use the present perfect tense to talk about an action that started in the past and continues to the present.表示过去开始,现在还在继续的表示过去开始,现在
4、还在继续的动作。动作。We use the present perfect tense to talk about an action that happened in the past and has a connection with the present.表示过去发生的或已完成的动作对现在造成的影响或结果表示过去发生的或已完成的动作对现在造成的影响或结果。PastpresentEddie has eaten my food.Eddie ate the food and now Hobo has nothing to eat.We also use the present perfect
5、 tense to talk about how many times an action has happened till now.谈论动作已经发生了很多次。谈论动作已经发生了很多次。I have already read this book many times.We use the simple past tense to talk about what happened at a definite time in the past.(一般过去时谈论在过去的特定时间发生的事)一般过去时谈论在过去的特定时间发生的事)Step3:While taskTask1:Group workMake
6、 a conclusion about the basic structure of PPTSubject(主语主语)have/has+(not)(助动词助动词)past participle(过去分词过去分词)I/You/We/They have(not)moved.He/She/It has(not)moved.Have/Has+主语主语 +动词的过去分动词的过去分词词HaveI/you/we/theymoved?Hashe/she/itYes,I/you/we/theyhave.he/she/ithas.No,I/you/we/theyhave.not/havent.he/she/ith
7、as not/hasnt.一般疑问句一般疑问句Adverbs of timelalready:肯定句,表示已经发生lever:疑问句,表示“曾经”lfor:肯定句/疑问句/否定句,表示一段时间ljust:肯定句,表示“刚刚”lnever:否定句,表示“从不”lrecently:肯定句/否定句/疑问句,表示“最近”lsince:肯定句/否定句/疑问句,表示“自-以后”lyet:疑问句/否定句,表示“已经”或者“还没有”Exercisesl1.I _(have)lunch already.l2.Has the train_(arrive),yet?l3.Tome _ never_(be to)Ch
8、ina.l4.The twin _just _(see)my father.l5.The twins _(see)my father just now.have hadarrivedhasbeen tohasseensaw 1 Have you done your homework _?(for,just,yet)2 I have _ been to Chengdu.(for,never,yet)3 He has worked there _ he left school.(already,just,since)4 She has known Sam _ nine years.(for,nev
9、er,since)5 Have you _ ridden a horse?(ever,for,yet)yetneversinceforever6 They have _ arrived.(ever,just,yet)7 He has _ washed the dishes(already,ever)8 We have not completed the project _.(already,for,yet)justyetalready Forming the past participle of verbsMost verbs+edwashwashedVerbs ending in e+dli
10、velivedVerbs ending in a consonant+y-y+iedstudystudiedShort verbs ending in a vowel+a consonantdouble the consonant+edstopstoppedStep3:While taskTask2:Learn the rulesmovelivelovelike写出下列动词的过去式和过去分词写出下列动词的过去式和过去分词:visitrepairwatchfinishvisited visited repaired repairedwatched watchedfinished finished
11、moved moved lived lived loved loved liked liked verbed以以e结尾结尾d写出下列动词的过去式和过去分词写出下列动词的过去式和过去分词:stopmoptrapplanstopped stopped mopped moppedtrapped trappedplanned planned注注:以一个辅音字母结尾的重读闭音节词以一个辅音字母结尾的重读闭音节词,双写最后一个辅音字母双写最后一个辅音字母ed双写双写edstudy hurrystudied studiedhurried hurried去去yied注注:以辅音字母加以辅音字母加y结尾的词结尾
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